Improvement in sawing-mach ines



UNITED STATES PATENT OFFICE.

MARTIN NEWMAN, OF UNADILLA, NEW YORK, ASSIGNOR 'lOl HIMSELF AND CLARK I.HAYES,

OF SAME PLACE.

IMPROVEMENT IN sAwlNG-MACHINES.

Specification forming part of Letters Patent No. 48,875, dated `luly 18,1865.

fo all whom it may concern:

Be it known that I, MARTIN NEWMAN, of Unadilla, in the county of Otsegoand State of New York, have in vented certain new and usefulImprovements in Machines for Edging or Slitting Boards; and I do herebydeclare the following to be a full,'clear, and exact description of thesame, reference being had to the accompanying drawings, making a part ofthis specification, in which- Figure l represents a view from one sideof the machine. Fig. 2 represents a view of the opposite side thereof.Fig. 3 represents a top plan of the machine.

Similar letters ofrefere11ce,where they occur in the separate figures,denote like parts of the machine in all the drawings.

My invention consists,first, in combining with one of each pairoffeed-rolls, which are hung in hinged frames or roller-caps, alifting-lever or its equivalent for raising and lowering said rolls torelease and to apply their pressure to the board to be acted upon, asthe case may be.

My invention further consists in combining with the yielding one of apair of feed -rollers a rigid cap or frame that will cause said roll toalways maintain a proper working position to feed the board straightthrough, and to prevent either end of said roll from rising or fallingindependent of the other end, or making unequal pressure on the board;and my invention further consists in moving the saw (or one of the saws,if two or more are used) on its shaft by means of a lever, bell-crank,slide, slot, and feather, as contradistinguished from a turningscrew-shaft and its'appliances, by which I am enabled to shift the sawinstantaneously, and thus economize much time in the operation.

To enable others skilled in the art to make and use my invention, I willproceed to describe the same with reference to the drawings.

On a suitable frame, A, I mount a saw-shaft, B, which may be driven byan endless belt from any rst-moving power passing around its pulley C.On this shaft I mount one permanent saw, D, and one movable saw, E-thatis to say, permanent and movable as regards the shaft lengthwise, butboth rotating with said shaft. The saw-shaft B has along slot or groove,a, cut in it, in which a feather on the hub F of the movable sawworks,in the usual well-known manner, for the purpose of causing the sawto revolve with said shaft, and to admit at the same time of shifting itthereon, as occasion may require A forked arm, b, made adjustable, as ato, straddles a neck, r1, on the hub I of the movable saw, andv this arm,to cause it to move freely without cramping or binding, is connected bya frame or carriage, f, to a guide-rod underneath the frame, to make itmove in a true line. To this carriage fis connected, by a link, g, onearm, h, of. a bellcrank lever, pivoted to the main frame at e', and theother arm,j, of the bell-crank is pivoted to a connecting-rod, G, therear end ot" which is fastened to a vertical, or nearly so, pivotedhand-lever, H, near the operators stand, so that he can from hisposition shift the saw E on the saw-shaft at pleasure, and hold itthere, it' necessary, by any of the ordinary known fastenings orsupports, though in practice I find that the friction between thefeather (which works in the slot a, and which feather I make ofconsiderable length) and the slot in the saw-shaft, when the saw iscutting, is sufficient of itself to hold thesaw from moving, butadditional means of holding the saw may be applied, as above intimated,to the lever H, by which it is moved when found necessary.

On each side, front and rear, of the sawshaft` B, I arrange thefeedrolls, as seen, by theirjournais l 2 and 3 4, respectively, in Fig.2. The lower rolls of the two pairs, 1 3, by pref- 'erence, I makenon-yielding. The upper ones of the two pairs, 2 4, are, by preference,made yielding, and are hung to the main frame by arms I pivoted at k.These arms I are connected by what I terni roller-caps77 J, so that theyshall, as it were, be one solid piece, and, indeed, may be so cast orwrought, the object being to cause the rolls that are hung in them torise and fall uniformly at each end and bear equally throughout,which isnot the case when independently hung at each end; and when the pressureis not uniform the board is carried out of its proper-straightdirection, because the pressure is not uniform on both of its edges; butby connecting both ends of the rolls by this rigid cap J one end cannotrise or fall without the other.

To raise and lower the yielding rolls of the pairs I arrange a Y-shapedpiece, K, at one side of the main frame, and in suitable guides, ZZ, sothat it may raise and lower in a true line and not bind. The arms m ofthis piece K take respectively under the arms I of the top rolls of thepairs, and by means of a lever, L, pivoted to the main frame at a, andextending to the stand or operator-s position, these top or yieldingrolls may be raised up and held up by a pin, stop, or catch at o, totake their pressure from the board and allow it to be run back to beshifted for the next kerf, or to be removed, as will be described inconnection with the feed motion.

On the end of the saw-shaft B there is a pulley, M, around Awhich andaround a pulley, N, passes an endless belt, O, to give said latterpulley N its motion. The pulley or wheel N is fast on a shaft, p, thatturns in an arm, l?, that is in turn made fast to a rock-shaft, Q, towhich alever, R, is fastened to operate it. The shaft p carries a smallmetallic friction-roll, (shown in red dotted lines,Fig. 1,) which Worksbetween the flanges q rot' a wheel, S, fastened to the lower roll, l, ofthe front pair of feedrolls, but so works, or is of such diameter thatit can only be in working contact with one flange or the other at thesame time, and it is thrown or pressed against one or the other of theanges, as the ease may be, by means ot' the lever R, which extends backto the stand or position ofthe operator,who,without changingluinosition, can thus shift the saw on its shalt, raise up or let down theyielding feedrolls, and change the direction of the feed motion at will.

On the inside face of the wheel S there is a pulley, T, around which,and around a pulley, U, on the end of the rear non-yielding feedroll 8,passes an endless belt, V, by which the said rear feed-roll gets amotion in the same direction that the front one moves, whether thatdirection be to feed the board to the saws or back again. When thefriction-wheel (in red lines, Fig. 1) is brought against the flange rand held there the motion of the feed-rolls is to move the board againstthe saws. When, however, the friction-roll is against the flange q, thenthe motion of the feed-rolls is reversed and the board is carried backto the place of starting. In the manner in which I have arranged thefriction-wheel it requires a continued pressure or holding of the leverR to feed the board to the saws, and by simply letting go the lever thefeed becomes reversed and the board runs back to the place of starting,the tendency of the belt O being to keep the friction-wheel in contactwith the ange q, when there are no other controlling circumstances, andthis flange, by its frictional contact with the small roll, runs theboard back. This mechanism may be changed so that the general tendencyof the feed-rolls shall be to feed the board to the saws, while thereverse motion may be had by applying the lever or its equivalent.

The advantage of my peculiar saw-shifting mechanism is that the saw canbe moved instantaneously, and no time is lost, as is the ease where ascrew-shaft and nut are used.

W are rollers on which the board is placed that is to Vbe operated upon.

I would state that I am aware that in a shingle-machine a carriagecarrying the bolt has been run back and forth by means of afriction-roller andan ged wheel. This Ido not claim; but

Having thus fully described my invention, what I claim isl. Combiningwith the yielding rolls of a pair or pairs of feed-,rolls alifting-piece and a lever, so that the operator from his stand may raiseup, hold up, or let down said yielding rolls at will, substantially asdescribed.

2. In combination with yielding rolls hung at both ends, the connectingof said end supports by a rigid roller-cap to prevent one end of saidroll from rising or falling independent of its other end, and to makethe pressure on 'the board uniform at both edges, and thus MARTIN NEWMAN.

Witnesses:

A. H. MEEKER, F. A. BoLLEs.

